mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-05 05:04:04 +02:00
85 lines
2.3 KiB
Diff
85 lines
2.3 KiB
Diff
|
From 2309613958ee518f94f1a7ba900e08e604e06048 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Jack Veenstra <veenstra@android.com>
|
||
|
|
Date: Fri, 1 May 2009 18:50:10 -0700
|
||
|
|
Subject: [PATCH 133/134] [ARM] goldfish: qemutrace: Add mmap support.
|
||
|
|
|
||
|
|
This makes a page of data available for writing from user-space to allow
|
||
|
|
the Dalvik interpreter to send method trace information to the emulator.
|
||
|
|
|
||
|
|
Signed-off-by: Jack Veenstra <veenstra@android.com>
|
||
|
|
---
|
||
|
|
drivers/misc/qemutrace/qemu_trace.c | 35 ++++++++++++++++++++++++++++++++++-
|
||
|
|
1 files changed, 34 insertions(+), 1 deletions(-)
|
||
|
|
|
||
|
|
--- a/drivers/misc/qemutrace/qemu_trace.c
|
||
|
|
+++ b/drivers/misc/qemutrace/qemu_trace.c
|
||
|
|
@@ -53,6 +53,7 @@
|
||
|
|
|
||
|
|
static unsigned char __iomem *qt_base;
|
||
|
|
static int init_called;
|
||
|
|
+static uint32_t qemu_trace_paddr;
|
||
|
|
|
||
|
|
/* PIDs that start before our device registered */
|
||
|
|
#define MAX_INIT_PIDS 2048
|
||
|
|
@@ -330,8 +331,30 @@ static void qemu_trace_dump_init_threads
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
+static int qemu_trace_mmap_fop(struct file *file, struct vm_area_struct *vma)
|
||
|
|
+{
|
||
|
|
+ int ret = io_remap_pfn_range(vma, vma->vm_start,
|
||
|
|
+ (qemu_trace_paddr >> PAGE_SHIFT) + 1,
|
||
|
|
+ PAGE_SIZE, vma->vm_page_prot);
|
||
|
|
+ if (ret < 0)
|
||
|
|
+ return ret;
|
||
|
|
+ return 0;
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
+static const struct file_operations qemu_trace_fops = {
|
||
|
|
+ .owner = THIS_MODULE,
|
||
|
|
+ .mmap = qemu_trace_mmap_fop,
|
||
|
|
+};
|
||
|
|
+
|
||
|
|
+static struct miscdevice qemu_trace_device = {
|
||
|
|
+ .minor = MISC_DYNAMIC_MINOR,
|
||
|
|
+ .name = "qemu_trace",
|
||
|
|
+ .fops = &qemu_trace_fops,
|
||
|
|
+};
|
||
|
|
+
|
||
|
|
static int qemu_trace_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
+ int err;
|
||
|
|
struct resource *r;
|
||
|
|
|
||
|
|
/* not thread safe, but this should not happen */
|
||
|
|
@@ -340,18 +363,28 @@ static int qemu_trace_probe(struct platf
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||
|
|
- if (r == NULL)
|
||
|
|
+ if (r == NULL || r->end - r->start < 2 * PAGE_SIZE - 1)
|
||
|
|
return -EINVAL;
|
||
|
|
+ qemu_trace_paddr = r->start;
|
||
|
|
qt_base = ioremap(r->start, PAGE_SIZE);
|
||
|
|
printk(KERN_INFO "QEMU TRACE Device: The mapped IO base is %p\n", qt_base);
|
||
|
|
|
||
|
|
qemu_trace_dump_init_threads();
|
||
|
|
+ err = misc_register(&qemu_trace_device);
|
||
|
|
+ if (err)
|
||
|
|
+ goto err_misc_register;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
+
|
||
|
|
+err_misc_register:
|
||
|
|
+ iounmap(qt_base);
|
||
|
|
+ qt_base = NULL;
|
||
|
|
+ return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int qemu_trace_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
+ misc_deregister(&qemu_trace_device);
|
||
|
|
iounmap(qt_base);
|
||
|
|
qt_base = NULL;
|
||
|
|
return 0;
|